# 3.8
travel = ['nanjing', 'beijing', 'qingdao', 'chengdu', 'xiamen']
print(travel)
print(sorted(travel))
print(travel)
print(sorted(travel, reverse=True))
print(travel)
travel.reverse()
print(travel)
travel.reverse()
print(travel)
travel.sort()
print(travel)
travel.sort(reverse=True)
print(travel)
# 3.9  见上一个
# 3.10
